Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4760fdd708bad2b4a18dc249be1306f43ab09baff5adf56a30cfa6985faeda1f' 
  AND token = 'W/rN2GMdBsLF+ZSteTa+Bd7vsicve5fieMwZHw3MtYo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}